package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

//微信服务接口地址
public static String WX_LOGIN="https://api.weixin.qq.com/sns/userinfo?access_token=";


    @Autowired
    private WeChatProperties weChatProperties;
   @Autowired
   private UserMapper userMapper;

    /**
 * 微信登录
 */
public User wxLogin(UserLoginDTO userLoginDTO) {

    //调用下面的方法getOpenid
    String openid=getOpenid(userLoginDTO.getCode());
    //判断openid是否为空  空就登陆失败  抛出业务异常
    if(openid==null){
        throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
    }
    //判断当前是否为新用户
    User user = userMapper.getByOpenid(openid);
    //新用户自动给注册
    if(user==null){
        user =User.builder()
                .openid(openid)
                .createTime(LocalDateTime.now())
                .build();
        userMapper.insert(user);
    }
    //返回这个用户对象
    return user;
}

    /**
     * 调用用微信接口服务，获取微信用户的openid
     * @param code
     * @return
     */
    private String getOpenid(String code) {
    //调用微信服务接口  ，获得当前微信用户的openid
    Map<String,String> map = new HashMap<>();
    map.put("appid",weChatProperties.getAppid());
    map.put("secret",weChatProperties.getSecret());
    map.put("js_code",code);
    map.put("grant_type","authorization_code");
    String json = HttpClientUtil.doGet(WX_LOGIN,map);

    JSONObject jsonObject = JSON.parseObject(json);
    String openid= jsonObject.getString("openid");
    return openid;
}
}
